<template>
  <div>
    <h2>Content{{ value }}</h2>
    <button @click="$emit('input', value + 1)">累加count</button>
  </div>
</template>

<script>
export default {
  name: "Content",
  props: ["value"],
};
</script>

<style>
</style>
32.v-model父子组件双向绑定其他练习